CME IMPACT: An interplanetary shock wave (probably the leading edge of a CME) hit Earth’s magnetic field on Nov. 12th at approximately 2300 UT, filling skies over northern Scandinavia with bright auroras. Oskar Pettersson sends this picture from Luleå, Sweden:

“Half of the sky was green and I stayed out for 5 hours observing the dancing light befor heading home,” says Pettersson.

from: spaceweather.com